GRB 090404: optical observations at BOOTES-3 and 1.5-m OSN.

ABSTRACT

"Following the detection by Swift of GRB 090404 (Ziaeepour et al. GCNC 9086), the 0.6-m Yock-Allen robotic telescope at the BOOTES-3 astronomical station in Blenheim (New Zealand) responded automatically, under non-favourable conditions (very high airmass). The first i'-band images taken 185s after the trigger time (15:59:35 UT) set a limiting magnitude of i' = 15 at this time. Follow-up observations at the 1.5-m telescope at Observatorio de Sierra Nevada in Granada have been obtained starting at 21:46 UT. No optical afterglow in the I-band is detected at the Swift/XRT enhanced position (Beardmore et al. GCNC 9088) down to the DSS2-infrared limit. A more detailed analysis is in progress."